Changing Engine Oil - Yamaha F15C Owner's Manual

Maintenance
flushing attachment or test tank can be
used.
A diagnostic tachometer should be used for
this procedure. Results may vary depending
on whether testing is conducted with the
flushing attachment, in a test tank, or with the
outboard motor in the water.
1. Start the engine and allow it to warm up
fully in neutral until it is running smooth-
ly.
TIP:
Correct idling speed inspection is only possi-
ble if the engine is fully warmed up. If not
warmed up fully, the idle speed will measure
higher than normal. If you have difficulty ver-
ifying the idle speed, or the idle speed re-
quires adjustment, consult a Yamaha dealer
or other qualified mechanic.
2. Verify whether the idle speed is set to
specification. For idle speed specifica-
tions, see page 13.
EMU29077

Changing engine oil

Change the engine oil several minutes after
the engine has been stopped, so that the oil
is still warm, but not hot.
EWM01950
WARNING
Be sure the outboard motor is securely
fastened to the transom or a stable stand.
ECM01710
NOTICE
Change the engine oil after the first 20
hours of operation or 3 months, and ev-
ery 100 hours or at 1-year intervals there-
after. Otherwise the engine will wear
quickly.
1. Put the outboard motor in an upright po-
sition (not tilted). NOTICE: If the motor
is not level, the oil level indicated on
74
the dipstick may not be accurate.
[ECM01860]
2. Prepare a suitable container that holds a
larger amount than the engine oil capac-
ity. Loosen and remove the drain screw
while holding the container under the
drain hole. Then remove the oil filler cap.
Let the oil drain completely. Wipe up any
spilled oil immediately.
1
1. Drain screw
3. Put a new gasket on the oil drain screw.
Apply a light coat of oil to the gasket and
install the drain screw.
Drain screw tightening torque:
28.0 Nm (2.86 kgf-m, 20.7 ft-lb)
TIP:
If a torque wrench is not available when you
are installing the drain screw, finger tighten
ZMU05554
ZMU05561